Search found 57 matches

by Camille 4I
Sat Dec 07, 2019 10:55 pm
Forum: Identifying Acidic & Basic Salts
Topic: pH of salts/hw #12.65
Replies: 3
Views: 1243

Re: pH of salts/hw #12.65

For part B, why would the pH become greater than 7?
by Camille 4I
Sat Dec 07, 2019 1:31 am
Forum: Lewis Structures
Topic: Lewis structure of OSbCl3 and question about transition meta
Replies: 3
Views: 997

Re: Lewis structure of OSbCl3 and question about transition meta

The answer key says that Sb will form four single bonds. Which structure is more stable?
by Camille 4I
Fri Dec 06, 2019 2:36 pm
Forum: Dipole Moments
Topic: Melting and Boiling Points
Replies: 9
Views: 249

Re: Melting and Boiling Points

What makes for a higher boiling point, ion-dipole interactions or hydrogen bonding?
by Camille 4I
Wed Dec 04, 2019 11:28 pm
Forum: Biological Examples
Topic: Cisplatin
Replies: 9
Views: 266

Re: Cisplatin

Why is cisplatin square planar and not tetrahedral?
by Camille 4I
Wed Dec 04, 2019 10:00 pm
Forum: Lewis Acids & Bases
Topic: Problem 12.51 Part (a)
Replies: 3
Views: 489

Re: Problem 12.51 Part (a)

How do oxygen atoms affect the strength of an acid here?
by Camille 4I
Wed Dec 04, 2019 9:55 pm
Forum: Acidity & Basicity Constants and The Conjugate Seesaw
Topic: 12.49 Stronger Base
Replies: 6
Views: 1230

Re: 12.49 Stronger Base

How do we know that HBrO is the corresponding weak acid that creates the base BrO-?
by Camille 4I
Wed Dec 04, 2019 9:34 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Value of Delta X
Replies: 9
Views: 523

Re: Value of Delta X

In the question 1b28, the diameter is given as 2.00x10^2 nm. Should I use 2.00x10^-7 meters for the diameter for delta X?
by Camille 4I
Wed Dec 04, 2019 7:03 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: T-shape
Replies: 21
Views: 380

Re: T-shape

Are T-shaped molecules all in the same plane? Or are they 3D?
by Camille 4I
Tue Dec 03, 2019 11:03 pm
Forum: Calculating pH or pOH for Strong & Weak Acids & Bases
Topic: 6B. 1
Replies: 2
Views: 73

Re: 6B. 1

What is the equation for this reaction?
by Camille 4I
Sun Dec 01, 2019 2:04 pm
Forum: Ionic & Covalent Bonds
Topic: Ionization Energy
Replies: 5
Views: 230

Re: Ionization Energy

What is the reasoning behind Na having a smaller first ionization energy than Mg?
by Camille 4I
Sun Dec 01, 2019 1:08 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Nickel Electron Configuration
Replies: 3
Views: 829

Re: Nickel Electron Configuration

I am very confused on this concept. If Ni has 8 electrons in its 3d orbital, and a full 3d orbital is 3d10, then shouldn't there be 8 electrons that are unpaired?
by Camille 4I
Sun Dec 01, 2019 11:39 am
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Coulombic potential energy
Replies: 3
Views: 165

Re: Coulombic potential energy

Will we have to use this equation on the final or simply know the concept behind it?
by Camille 4I
Fri Nov 29, 2019 2:24 pm
Forum: Properties of Electrons
Topic: Question 1.15 on homework
Replies: 11
Views: 4995

Re: Question 1.15 on homework

How would you solve this problem using the equation En = -hR/n^2? This is the equation included on the Constants and Equations sheet.
by Camille 4I
Thu Nov 28, 2019 2:02 pm
Forum: Properties of Electrons
Topic: Speed of an Electron (hw 1.43)
Replies: 6
Views: 2834

Re: Speed of an Electron (hw 1.43)

Hi, I have been solving for delta p with this equation: (6.62607x10^-34)/(4pi)(350x10^-12) and then using this answer in the equation delta P=mv. However, my answer continues to be 1.63x10^6. What could I be doing wrong?
by Camille 4I
Sun Nov 24, 2019 5:25 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Sphere
Replies: 2
Views: 33

Re: Coordination Sphere

I believe the coordination sphere is useful in determining the shape of a compound because coordination sphere refers to the ligands directly attached to the central atom.
by Camille 4I
Sun Nov 24, 2019 4:56 pm
Forum: Shape, Structure, Coordination Number, Ligands
Topic: Coordination Sphere
Replies: 2
Views: 33

Re: Coordination Sphere

I believe the coordination sphere is useful in determining the shape of a compound because coordination sphere refers to the ligands directly attached to the central atom.
by Camille 4I
Sun Nov 24, 2019 4:40 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2F.17
Replies: 2
Views: 41

Re: 2F.17

I understand why the Carbon atom is sp2 hybridized, but why is the Oxygen atom also sp2 hybridized?
by Camille 4I
Sun Nov 24, 2019 3:57 pm
Forum: Hybridization
Topic: 2F.15
Replies: 2
Views: 40

Re: 2F.15

So bond angle decreases as s-character decreases? Because when a structure gains more atomic orbitals, its bond angles decrease as the orbitals are forced closer together?
by Camille 4I
Sun Nov 24, 2019 3:46 pm
Forum: Hybridization
Topic: Question 4.39 [ENDORSED]
Replies: 4
Views: 425

Re: Question 4.39 [ENDORSED]

How do the 4 phosphorus atoms form a tetrahedral? Wouldn't they form a trigonal planar shape?
by Camille 4I
Sun Nov 24, 2019 3:33 pm
Forum: Hybridization
Topic: HW 2F.5.
Replies: 3
Views: 71

Re: HW 2F.5.

To answer this question, do you have to write out the electron movement during transformation?
by Camille 4I
Sun Nov 17, 2019 11:24 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E. 11
Replies: 2
Views: 36

Re: 2E. 11

How would you determine the bond angles of iodine trichloride? I understand the shape, but not the angles.
by Camille 4I
Sun Nov 17, 2019 11:13 pm
Forum: Dipole Moments
Topic: SCl4 Molecule
Replies: 5
Views: 52

Re: SCl4 Molecule

Is it safe to assume that a molecule like SCl4 that has a trigonal bipyramidal electron arrangement but with one lone pair, will become a seesaw shape?
by Camille 4I
Sun Nov 17, 2019 11:08 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: T-shape
Replies: 6
Views: 81

Re: T-shape

Why is the shape of this molecule T-shaped, and not seesaw?
by Camille 4I
Sun Nov 17, 2019 10:46 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 2E. 5 Question
Replies: 4
Views: 43

Re: 2E. 5 Question

What is the lewis structure for ClO2-?
by Camille 4I
Sun Nov 17, 2019 10:33 pm
Forum: Lewis Structures
Topic: Drawing Lewis Structures (Multiple Atoms)
Replies: 3
Views: 58

Re: Drawing Lewis Structures (Multiple Atoms)

Do the fluorine atoms repel the hydrogen atoms and push them closer together, since the fluorines have a lot more electrons than the hydrogen atoms?
by Camille 4I
Sun Nov 10, 2019 10:32 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.5
Replies: 4
Views: 387

Re: 4.5

Do lone pairs have more repulsion than double bonds?
by Camille 4I
Sun Nov 10, 2019 10:20 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: 4.3 Draw the structures and name the shapes of the following molecules: (a) HCN; (b) CH2F2.
Replies: 4
Views: 421

Re: 4.3 Draw the structures and name the shapes of the following molecules: (a) HCN; (b) CH2F2.

How do you know that the two bonds with hydrogen are next to each other, versus across the molecule from each other?
by Camille 4I
Sun Nov 10, 2019 10:15 pm
Forum: Determining Molecular Shape (VSEPR)
Topic: Linear Shape
Replies: 2
Views: 541

Re: Linear Shape

If an atom has three lone pairs, wouldn't two of the lone pairs have stronger repulsion than the single lone pair on the other side?
by Camille 4I
Tue Nov 05, 2019 8:28 pm
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: Heisenberg Uncertainty Quantum World Worksheet
Replies: 3
Views: 129

Re: Heisenberg Uncertainty Quantum World Worksheet

However, if I were to try to solve this equation, how would I determine the velocity to plug in?
by Camille 4I
Tue Nov 05, 2019 3:49 pm
Forum: Electron Configurations for Multi-Electron Atoms
Topic: Ni3+
Replies: 3
Views: 3432

Re: Ni3+

Hi,
Wouldn't we want Ni to have a half full 3d orbital, since it is more stable that way?
by Camille 4I
Sun Nov 03, 2019 11:58 pm
Forum: Properties of Electrons
Topic: Wavelength of radiation
Replies: 5
Views: 5314

Re: Wavelength of radiation

What equation would we use to relate velocity with wavelength?
by Camille 4I
Sun Nov 03, 2019 11:51 pm
Forum: Properties of Light
Topic: Photons of light
Replies: 5
Views: 6290

Re: Photons of light

Why do we have to multiply 32J/S by 2?
by Camille 4I
Sun Nov 03, 2019 11:42 pm
Forum: DeBroglie Equation
Topic: Given the energy, calculate the wavelength of y-rays
Replies: 11
Views: 1690

Re: Given the energy, calculate the wavelength of y-rays

Also,
does the fact that the radiation consists of y-ray photons matter in this situation?
by Camille 4I
Fri Nov 01, 2019 9:48 am
Forum: Ionic & Covalent Bonds
Topic: Home work question 3.39
Replies: 3
Views: 965

Re: Home work question 3.39

How can you determine that the formula for ammonium chloride is NH4Cl?
by Camille 4I
Fri Nov 01, 2019 9:41 am
Forum: Lewis Structures
Topic: Identifying an element from a given Lewis Structure (3.37)
Replies: 3
Views: 785

Re: Identifying an element from a given Lewis Structure (3.37)

Hi, are you using the formal charge equation to figure out that this is phosphorus?
by Camille 4I
Mon Oct 28, 2019 12:50 am
Forum: Heisenberg Indeterminacy (Uncertainty) Equation
Topic: HW question
Replies: 3
Views: 81

Re: HW question

How do you know to multiply 5.00 m/s by 2?
by Camille 4I
Sun Oct 27, 2019 11:56 pm
Forum: DeBroglie Equation
Topic: HW 1.41
Replies: 6
Views: 117

Re: HW 1.41

Hi, do we have to memorize the mass of a neutron? Or will be provided this on tests, because the question did not provide this mass.
by Camille 4I
Sun Oct 27, 2019 11:49 pm
Forum: DeBroglie Equation
Topic: 1B.21
Replies: 3
Views: 90

Re: 1B.21

Would I be able to convert to kilograms after proceeding with the equation? I already did the De Broglie equation and am wondering if it is possible to convert these units after doing the calculations.
by Camille 4I
Sun Oct 27, 2019 11:40 pm
Forum: DeBroglie Equation
Topic: 1B. 19
Replies: 4
Views: 66

Re: 1B. 19

Do I have to look up the masses of protons and neutrons? I know they are both roughly around 1, but since they are slightly different and I need to calculate the difference in wavelengths, should I use a more specific number?
by Camille 4I
Thu Oct 24, 2019 12:04 am
Forum: DeBroglie Equation
Topic: Given the energy, calculate the wavelength of y-rays
Replies: 11
Views: 1690

Re: Given the energy, calculate the wavelength of y-rays

How do you change the answer value in meters to pm? The answer in the back of the book is in pm.
by Camille 4I
Wed Oct 23, 2019 11:36 pm
Forum: Quantum Numbers and The H-Atom
Topic: Balmer and Lyman Series
Replies: 6
Views: 447

Re: Balmer and Lyman Series

For the ultraviolet region of atomic hydrogen, I know that n=1. Can I use the equation frequency = R(1/n1^2 - 1/n2^2) to solve these problems?
by Camille 4I
Mon Oct 21, 2019 2:10 am
Forum: General Science Questions
Topic: Quick clarification
Replies: 4
Views: 117

Re: Quick clarification

Planck's constant is used in equations such as E=hu and E=hc/λ.
by Camille 4I
Mon Oct 21, 2019 2:08 am
Forum: Bohr Frequency Condition, H-Atom , Atomic Spectroscopy
Topic: When do you use a negative sign in the Bohr equation?
Replies: 7
Views: 90

Re: When do you use a negative sign in the Bohr equation?

I'm pretty sure that as energy can't be "negative", you should take the absolute value of the answer that you get at the end of the equation.
by Camille 4I
Fri Oct 18, 2019 12:48 am
Forum: Properties of Electrons
Topic: Question 1.15 on homework
Replies: 11
Views: 4995

Re: Question 1.15 on homework

How can you tell that the transition is in the Lyman series from the fact that it is in the ultraviolet spectrum of atomic hydrogen?
by Camille 4I
Thu Oct 17, 2019 11:38 pm
Forum: Photoelectric Effect
Topic: Given the kinetic energy, how do you find the energy? [ENDORSED]
Replies: 4
Views: 1136

Re: Given the kinetic energy, how do you find the energy? [ENDORSED]

In this problem, is the kinetic energy referring to the excess energy? Or is it referring to the energy needed to emit an electron?
by Camille 4I
Thu Oct 17, 2019 11:22 pm
Forum: Photoelectric Effect
Topic: Photoelectric effect [ENDORSED]
Replies: 6
Views: 555

Re: Photoelectric effect [ENDORSED]

Where did you get the number 4.200x10^-19 from?
by Camille 4I
Sun Oct 13, 2019 11:59 pm
Forum: Photoelectric Effect
Topic: Intensity vs. Length of Waves
Replies: 4
Views: 60

Re: Intensity vs. Length of Waves

How does fluctuation in wavelength of energy affect the intensity of the energy? Is it inversely or directly proportional?
by Camille 4I
Sun Oct 13, 2019 11:58 pm
Forum: Properties of Electrons
Topic: Electrons and Photons
Replies: 2
Views: 58

Re: Electrons and Photons

I am also confused about when ions bond together, whether or not their charges will be unequal to their positive proton charges. Or do the bonds between them cancel out their ionic charges?
by Camille 4I
Thu Oct 10, 2019 7:22 pm
Forum: Limiting Reactant Calculations
Topic: M7
Replies: 1
Views: 78

M7

Solid boron can be extracted from solid boron oxide by reaction with magnesium metal at a high temperature. A second product is solid magnesium oxide. a) Write a balanced equation for the reaction. b) What mass of boron can be produced when 125 kg of boron oxide is heated with 125 kg of magnesium? T...
by Camille 4I
Thu Oct 10, 2019 5:24 pm
Forum: Molarity, Solutions, Dilutions
Topic: L7 Help
Replies: 4
Views: 634

Re: L7 Help

What does oxidize mean in this equation? Does it mean simply how much oxygen is needed to react with 454 grams of tristearin?
by Camille 4I
Thu Oct 10, 2019 10:18 am
Forum: Molarity, Solutions, Dilutions
Topic: G 25
Replies: 7
Views: 262

Re: G 25

Do we actually have to double the solution 90 times? If so, is there a formula or shortcut way of doing this?
by Camille 4I
Thu Oct 10, 2019 12:07 am
Forum: Molarity, Solutions, Dilutions
Topic: Fundamentals G13
Replies: 6
Views: 1486

Re: Fundamentals G13

Is there a way to count for two nitrogen atoms in one mole of NH4NO3 before the final calculation?
by Camille 4I
Sun Oct 06, 2019 11:49 pm
Forum: Molarity, Solutions, Dilutions
Topic: F. 13 Empirical & Molecular Formula
Replies: 2
Views: 90

Re: F. 13 Empirical & Molecular Formula

For molecules that do not contain metals, do you always determine the name by number of atoms?
by Camille 4I
Sun Oct 06, 2019 11:28 pm
Forum: Accuracy, Precision, Mole, Other Definitions
Topic: E.29 b and c
Replies: 3
Views: 99

Re: E.29 b and c

How would you determine the total mass of the sample due to oxygen? When I start with 0.042 moles of copper (II) chloride tetrahydrate, I identify that there are 4 moles H2O in 1 mole of copper (II) chloride tetrahydrate. Can I then proceed with identifying that there is 1 oxygen atom in H2O? How sh...
by Camille 4I
Sun Oct 06, 2019 11:11 pm
Forum: SI Units, Unit Conversions
Topic: Homework Problem E. 29
Replies: 3
Views: 69

Re: Homework Problem E. 29

How would you use dimensional analysis to determine moles of Cl- ions from 8.61 grams of copper (II) chloride tetrahydrate? I understand how to convert the grams to moles, but I am stuck as how to proceed.
by Camille 4I
Sat Oct 05, 2019 1:50 am
Forum: Balancing Chemical Reactions
Topic: Compound names
Replies: 11
Views: 188

Re: Compound names

Does anyone know how to determine what the formula for nitrous acid is? Are there rules that can help with this?
by Camille 4I
Tue Oct 01, 2019 1:33 pm
Forum: Molarity, Solutions, Dilutions
Topic: HW1 F3 Help
Replies: 4
Views: 102

Re: HW1 F3 Help

Hello, I understand that nitric acid is composed of NO3 and H, and that most acids have H in their formula. Also, I am aware that NO3 is an ion with a negative charge and H is an ion with a positive charge, which holds them together in an ionic bond. But how would you know that NO3 (nitrate) should ...

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